Patience

A reasonable route, but care is needed with the rock, although it has cleaned up over the years. Start near the right-hand end of the buttress below a shattered overhanging corner. Move up the corner until you reach a sloping ledge, then a move right gains a jagged crack. Take this up to the overhang and move left into the chimney. Scuttle up this for a few metres before swinging right across the overhanging wall to the arete, and dash up the slab to the top.